Commit 57fa576a authored by Yang Tse's avatar Yang Tse
Browse files

configure: check if compiler halts on function prototype mismatch

parent f6af9d98

configure.ac

+1 −0
Original line number Diff line number Diff line
@@ -340,6 +340,7 @@ fi 


CURL_CHECK_COMPILER_HALT_ON_ERROR

CURL_CHECK_COMPILER_ARRAY_SIZE_NEGATIVE

CURL_CHECK_COMPILER_PROTOTYPE_MISMATCH

CURL_CHECK_COMPILER_SYMBOL_HIDING



CURL_CHECK_NO_UNDEFINED

m4/curl-compilers.m4

+37 −1
Original line number Diff line number Diff line
@@ -21,7 +21,7 @@ 
#***************************************************************************



# File version for 'aclocal' use. Keep it a single number.

# serial 63

# serial 64





dnl CURL_CHECK_COMPILER
@@ -1495,6 +1495,42 @@ AC_DEFUN([CURL_CHECK_COMPILER_SYMBOL_HIDING], [ 
])





dnl CURL_CHECK_COMPILER_PROTOTYPE_MISMATCH

dnl -------------------------------------------------

dnl Verifies if the compiler actually halts after the

dnl compilation phase without generating any object

dnl code file, when the source code tries to redefine

dnl a prototype which does not match previous one.



AC_DEFUN([CURL_CHECK_COMPILER_PROTOTYPE_MISMATCH], [

  AC_REQUIRE([CURL_CHECK_COMPILER_HALT_ON_ERROR])dnl

  AC_MSG_CHECKING([if compiler halts on function prototype mismatch])

  AC_COMPILE_IFELSE([

    AC_LANG_PROGRAM([[

#     include <stdlib.h>

      int rand(int n);

      int rand(int n)

      {

        if(n)

          return ++n;

        else

          return n;

      }

    ]],[[

      int i[2];

      int j = rand(i[0]);

      if(j)

        return j;

    ]])

  ],[

    AC_MSG_RESULT([no])

    AC_MSG_ERROR([compiler does not halt on function prototype mismatch.])

  ],[

    AC_MSG_RESULT([yes])

  ])

])





dnl CURL_VAR_MATCH (VARNAME, VALUE)

dnl -------------------------------------------------

dnl Verifies if shell variable VARNAME contains VALUE.